Custom High Torque Nema 17 Stepper Gearbox Planetary Factory, Manufacturers- Suzhou Retek Electric Technology Co., Ltd

Planetary Geared NEMA 17 Stepper: Ultimate Compact Torque

The Planetary Geared NEMA 17 Stepper Motor combines the digital positioning accuracy of a 1.8∘ stepper with a high-torque, low-backlash planetary gearbox.

This assembly maximizes the force output of the small NEMA 17 frame (42mm). It is a critical solution when high holding torque and precise indexing are required, but the physical space only allows for a compact NEMA 17 motor. Planetary gears ensure the output and input shafts are coaxial and deliver a higher torque capacity than spur gears in the same diameter, often achieving ratios from 3:1 to over 100:1.

Introduction

Detailed Parameters and Performance Data

RETEK: Miniature Powerhouse for 3D Printing and Small Robotics

Suzhou Retek Electric Technology Co., Ltd. focuses on reducing the reflected inertia of the gearbox back to the motor, allowing the motor to run smoothly without resonance issues. We use high-quality sintered or hardened steel gears, especially in the first stage, to handle the high input speed and torque ripple of the stepper motor, ensuring reliable, long-term operation in demanding applications like CNC small-tool changers.

Applications

Advanced Technology Highlights

High-Torque, Precision Applications in Small Frames

High-Force 3D Printer Extruders: Motors for demanding material extrusion (e.g., carbon fiber filled filament) that require massive, continuous force. Challenge: High torque in a light, compact head.
Small Robotic Arms: Drives for wrist and joint rotation requiring high holding torque against gravity.
Automated Test and Measurement: Drives for heavy optical filters or indexing wheels.
Valve Actuation: High-resolution indexing for industrial valves requiring significant rotational force.

Technical Specifications

Industrial & Commercial Usage

Technical Parameters (NEMA 17 Planetary)

Parameter	Range / Typical Value	Unit
Input Motor	NEMA 17 (42mm) Stepper	Standard
Max Output Torque	Up to 10	Nm
Reduction Ratio	3:1 to 100:1	Ratio
Output Backlash	Standard or Low Backlash ($ < 10$ arc-min)	Feature
Gearbox Material	Steel/Alloy	Type

Additional Information

Supplementary Details & Notes

Production & Customization Services

Production includes precise gear staging and assembly using specialized jigs to minimize backlash and maximize bearing life under high load.

Low Backlash Certification: Providing certified backlash testing (e.g., <8 arc-minutes) for demanding motion control systems.
Integrated Encoder/Brake: Factory mounting of an integrated rear brake (for holding power) and/or an encoder (for stall detection/closed-loop control).
Custom Input Pinion: Tuning the gear ratios by changing the motor's input pinion and the first stage gear set.
IP Rating Enhancement: Sealing the assembly to IP65 or higher standards for use in dusty or washdown environments.

Service & Support

Technical Advantages and Core Design Features

Torque Amplification: Multiplies the stepper's holding torque to deliver massive force from a compact motor.
Retained Accuracy: The combination maintains the high positional accuracy of the stepper motor (the final resolution is the step angle divided by the ratio).
High Efficiency: Planetary gear trains are typically >85% efficient, maximizing the motor's power output.
Coaxial Design: Input and output shafts are aligned, simplifying mounting and machine design.
Low Backlash Option: Servo-rated versions offer backlash below 10 arc-minutes for high repeatability.

Frequently Asked Questions

Common Inquiries Regarding Geared Stepper Motors

Q: Does a high-ratio gearbox negate the stepper's speed?
A: Yes. While the torque increases, the maximum speed decreases by the ratio. A 100:1 ratio motor designed to run at 1000 RPM max will only output 10 RPM max.

Q: How does the gearbox affect the required drive current?
A: The driver current remains the same as for the base NEMA 17 motor, as the gearbox is a purely mechanical component. The drive must still be tuned for the motor's electrical specifications.

Q: Can I run this motor in micro-stepping mode with the gearbox?
A: Yes. Micro-stepping smooths the rotation of the motor, and the gearbox further dampens any remaining vibration, resulting in exceptionally smooth, high-torque, low-speed motion.

Resources

Advanced Material Selection Guide

Gear Material: Hardened or sintered steel planets and sun gears, and often a steel ring gear, for high stress and minimal wear.

Lubricant: High-performance synthetic grease specified for high-pressure, low-speed gearing to manage continuous torque and heat.

Output Shaft: High-strength alloy steel, often keyed or splined to handle the high output torque without deformation.

About Jiangsu Retek Motion Co., Ltd.

Unlike other motor suppliers, Retek engineering system prevents the selling of our motors and components by catalogue as every model is customized for our customers. The customers are assured that every component they receive from Retek is designed with their exact specifications in mind. Our total solutions are a combination of our innovation and a close working partnership with our customers and suppliers.

As China High Torque Nema 17 Stepper Gearbox Planetary Manufacturers and Wholesale High Torque Nema 17 Stepper Gearbox Planetary OEM/ODM Suppliers, Retek business consists of three platforms: Motors, Die-Casting and CNC manufacturing and wire harness. Retek products are widely supplied for residential fans, vents, boats, airplanes, medical facilities, laboratory facilities, trucks and other automotive machines.

Welcome to send us an RFQ, it is believed you will get the best cost-effective products and services here!

Customized Solutions

Quality Assurance

Global Export

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